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UNITED STATES PATENT Erica.

lVILLIAM C. HOOD, OF RACINE, WISOONSIN, ASSIGNOR TO THE RACINE HARD WAREGOMPA NY, OF SAME PLACE.

SCHOOL-SEAT.

SPECIFICATION forming part of Letters Patent No. 533,591 dated February5, 1895.

Application filed July 9, 1 8 Q4. gerial No. 51 7, 00 3 We model.)

To all whom it may concern:

Be it known that I, IVILLIAM C. HOOD, a citizen of the United States,and a resident of Racine, in the county of Racine, and in the State ofWisconsin, have invented certain new and useful Improvements inSchool-Seats, Opera-Chairs, &5C.; and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention has for its object to provide a simple, economical andnoiseless automatic joint, especially designed for school-seats, butequally applicable to opera chairs and other seats; the same consistingin certain peculiarities of construction and combination of partshereinafter specified with refererence to the accompanying drawings andsubsequently claimed.

In the drawings: Figure 1 represents an elevation of a portion of aschool-seat embodying my improved joint; Fig. 2, a detail partlysectional view illustrating the joint when the seat is about midway ofits possible movement in either direction up or down,and Fig. 3, adetail plan view, the shank of the seatbracket being in horizontalsection.

Referring by letter to the drawings A represents a standard having anarm I? thereof terminated in a socket O for the reception of a ball D onthe shank E of a seat bracket F, the shank itself having play in a slotG that intercepts the hollow of said socket.

In order to have access to the socket, the latter is made sectional andone of these sections is detachably secured in place as clearlyillustrated in Fig.

It is to be noticed that the shank of the detachable section of thesocket is bolted to the standard-arm B, and that the bolt is below thecenter of the joint instead of through the latter, whereby I cheapenconstruction, and lessen friction.

By the employment of ball and socket joints between the standards andthe brackets for the seat, the latter will readily tilt up when theoccupant on rising exerts a slight pressure of his legs against itsfront edge. Being in this titled position the seat is in the way of aperson about to sit down, and consequently will return to a practicallyhorizontal position incidental with the movement of said person.

In order to render the joint noiseless I prefor to make the ball-portionthereof slightly elliptical where it is joined to the seat bracket, thehollow of the socket being on a true circle. In consequence of thisconstruction and the relative arrangement of the parts said ball willwedge in said socket as the seat comes to the limit of its throw ineither direction up or down.

As a further means for rendering the joint noiseless, as well as tocompensate for wear in the same, the socket-slot is contracted attheextremities thereof and consequently there will be a wedging fit of thebracketshank therein as the seat comes to the end of its movement up ordown, it being understood that the thickness of said shank issubstantially equal to the width of that portion of said slotintermediate of its contracted extremities.

Having now fully what I claim as new, Letters Patent, is

1. A seat standard having an arm terminating in a socket the hollow ofwhich is intercepted by a slot contracted at the extremities thereof, aseat-bracket having its shank engaging the slot, and a ball on the shankin engagement with the socket, the thickness of said shank beingsubstantially equal to the width of that portion of said slotintermediate of its contracted extremities.

2. A seat standard having an arm thereof terminating in a socket thehollow of which is a true circle and intercepted by a slot havingcontracted extremities, a seat-bracket engaging the slot, and a somewhatelliptical ball on the shank in engagement with the socket.

In testimony that I claim the foregoing I have hereunto set my hand, atRacine, in the county of Racine and State of Wisconsin, in the presenceof two witnesses.

WILLIAM 0. H001).

described my invention, and desire to secure by Witnesses:

R. B. LANG, E. W. FISHER.

